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Finding the Fourth Proportional to 438,628.58, 605,403.42 and 277,698.20

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Solution

The fourth proportional to 438,628.58, 605,403.42 and 277,698.20 is: 383,284.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    438,628.58 : 605,403.42 = 277,698.20 : x
  2. Step 2: Convert to fraction form
    438,628.58/605,403.42 = 277,698.20/x
  3. Step 3: Cross multiply
    438,628.58x = 605,403.42 × 277,698.20
  4. Step 4: Simplify right side
    438,628.58x = 168,119,440,007.84
  5. Step 5: Solve for x
    x = 168,119,440,007.84/438,628.58
  6. Step 6: Final answer
    x = 383,284.28

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.